68878761 has 24 divisors (see below), whose sum is σ = 107344224. Its totient is φ = 39170880.

The previous prime is 68878753. The next prime is 68878841. The reversal of 68878761 is 16787886.

It is not a de Polignac number, because 68878761 - 2³ = 68878753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68878751) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33246 + ... + 35256.

It is an arithmetic number, because the mean of its divisors is an integer number (4472676).

Almost surely, 2^68878761 is an apocalyptic number.

It is an amenable number.

68878761 is a deficient number, since it is larger than the sum of its proper divisors (38465463).

68878761 is a wasteful number, since it uses less digits than its factorization.

68878761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261 (or 2254 counting only the distinct ones).

The product of its digits is 903168, while the sum is 51.

The square root of 68878761 is about 8299.3229241909. The cubic root of 68878761 is about 409.9162251996.

The spelling of 68878761 in words is "sixty-eight million, eight hundred seventy-eight thousand, seven hundred sixty-one".